Reference : Revised structural phase diagram of (Ba0.7Ca0.3TiO3)-(BaZr0.2Ti0.8O3)
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Physics and Materials Science
http://hdl.handle.net/10993/45046
Revised structural phase diagram of (Ba0.7Ca0.3TiO3)-(BaZr0.2Ti0.8O3)
English
Keeble, Dean S. [> >]
Benabdallah, Feres [> >]
Thomas, Pam A. [> >]
Mario, Maglione [> >]
Kreisel, Jens mailto [University of Luxembourg > Rectorate >]
2013
APPLIED PHYSICS LETTERS
102
9
Yes
International
0003-6951 Kreisel, Jens/E-1939-2011 Keeble, Dean/A-2717-2016 Thomas, Pam/G-3532-2010 Keeble, Dean/C-1830-2012 Keeble, Dean/0000-0003-4225-3770 Thomas, Pam/0000-0003-2221-0394 ISI:000316085200049
[en] The temperature-composition phase diagram of barium calcium titanate zirconate (x(Ba0.7Ca0.3TiO3)(1-x)(BaZr0.2Ti0.8O3); BCTZ) has been reinvestigated using high-resolution synchrotron x-ray powder diffraction. Contrary to previous reports of an unusual rhombohedral-tetragonal phase transition in this system, we have observed an intermediate orthorhombic phase, isostructural to that present in the parent phase, BaTiO3, and we identify the previously assigned T-R transition as a T-O transition. We also observe the O-R transition coalescing with the previously observed triple point, forming a phase convergence region. The implication of the orthorhombic phase in reconciling the exceptional piezoelectric properties with the surrounding phase diagram is discussed. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4793400]
http://hdl.handle.net/10993/45046
10.1063/1.4793400

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